100% make more sense.

A community is but one use case of everything that can happen in nostr.

The difference is that with topic-based relays you could use all your existing clients for the different things within the context of that topic.

Middle-East microblogging

Middle-East long-form content

Middle-East communities

Middle-East highlights

You could even have a specific profile data for your npub (same npub!) that focuses on the stuff related to your persona within the "Middle-East" topic.